Locking hitch-pin for trailer



FIG. 1 is a perspective view of a locking hitch-pin for trailer showing my new design;

FIG. 2 is a left-end elevational view;

FIG. 3 is a right end elevational view;

FIG. 4 is a right side elevational view;

FIG. 5 is a left side elevational view;

FIG. 6 is a bottom view; and,

FIG. 7 is a top plan view. 

The ornamental design for a locking hitch-pin for trailer, as shown. 